Imovie transitions missing on 10.14.6
I have recently had to copy a version of Imovie off another Mac due to a disc crash. It's Imovie 10.1.14. The application is working fine except that I cannot get access to any of the standard transitions. Now I know this problem is not just affecting me, and I have read the solutions, none of which work.
So I would like to approach it differently. I have access to a fully working copy of Imovie on my wife's computer, the one I copied. She has her transitions working ok. So my question is:
Where does Imovie store the system transitions, so that I can copy them in manually please? we have searched for them without any success. I have asked Apple but they have refused to help me.
Thanks
iMac 27″ 5K, macOS 10.14